There's no right answer here. This may help:
Fuji X-E1 and Legacy Lenses but ultimately your lenses are simply like the brushes of an artist. You can find cheap ones, expensive ones, big ones, little ones, but they are simply a means to an end - your own self expression. Choose by what you want to achieve not by price. Choose from smooth Sonnars, edgy Elmars, nice Nikkors, funky FEDs, creamy Canons, or the optical excellence and neutrality of Fujinon lenses. Don't forget that particularly if you are only planning to use one legacy lens, or different lenses from different manufacturers, you have to budget for an adaptor or adaptors. DON'T BUY CHEAP - it's false economy. With legacy you gain the "look" of different formulations and computations, not to mention aberrations. You lose AF, consistency. You have to master manual focus and stop-down metering.
As I said, there is no right answer. It's your vision to realise.